jBox Java applet
Andhare, Manjiri
mandhare at STATE.PA.US
Wed Nov 24 09:26:39 EST 2004
Hello!!
Since last 3 days I'm trying to make the jBox applet work with the
Itasca workshop demo, but can't figure out whats goin wrong with it.
One thing which I found is, before I had placed the java/jBox directory
under my webroot, but in the documentation I found that I should put it
under the web document tree, for me which is:
c:/Inetpub/wwwroot/MapServer/Docs/tmp
So I added the java/jBox directory under my web document tree.
But still I can't see the map image while they are being created under
Docs/tmp directory.
When I click the initialize button on "index.html" with the "basic
application" option selected, I can see the legend, scalebar, reference
map.
When I click on zoom in radio button and try to draw a rectangle on the
map (which I don't see, just the gray area) and then if I click refresh
button, I can see that the reference map changes, it shows red box on
it.
And here is what I get in the url:
*****************************
1. After hitting the "initialize" button on index.html:
http://localhost/MapServer/cgi-bin/mapserv.exe?layer=lakespy2&layer=dlgs
tln2&zoomsize=2&map=c%3A%5CInetpub%5Cwwwroot%5CMapServer%5Citasca.map&pr
ogram=c%3A%5CInetpub%5Cwwwroot%5CMapServer%5Ccgi-bin%5Cmapserv.exe&root=
c%3A%5CInetpub%5Cwwwroot%5CMapServer&map_web_imagepath=c%3A%5CInetpub%5C
wwwroot%5CMapServer%5CDocs%5Ctmp%5C&map_web_imageurl=%5Ctmp%5C&map_web_t
emplate=c%3A%5CInetpub%5Cwwwroot%5CMapServer%5Citasca_basic.html
************************************
2. After selecting zoom in and trying to draw a rectangle on gray area
and clicking the refresh button on Itasca_basic.html:
http://localhost/MapServer/cgi-bin/mapserv.exe?mode=browse&layer=lakespy
2&layer=dlgstln2&zoomdir=1&zoomsize=2&imgbox=-1+-1+-1+-1&imgxy=299.5+299
.5&imgext=388107.634400+5200301.166444+500896.339020+5313063.023754&map=
c%3A%5CInetpub%5Cwwwroot%5CMapServer%5Citasca.map&root=c%3A%5CInetpub%5C
wwwroot%5CMapServer&savequery=true&program=c%3A%5CInetpub%5Cwwwroot%5CMa
pserver%5Ccgi-bin%5Cmapserv.exe&map_web_imagepath=c%3A%5CInetpub%5Cwwwro
ot%5CMapServer%5CDocs%5Ctmp%5C&map_web_imageurl=%5Ctmp%5C&map_web_templa
te=c%3A%5CInetpub%5Cwwwroot%5CMapServer%5Citasca_basic.html
*********************************************
I see that the value for imgbox has not changed, it's the same as
initialized on the html page, i.e. -1 -1 -1 -1
I also tried to put the color parameter to check if I'm getting the
rectangle or not, but I couldn't get the rectangle nor the map.
I checked the directory permissions, also added the CLASSPATH variable
mentioned in the jBOX HOWTo Document.
Am doing the right direction? Could someone please tell me where is the
possibility of making the mistake?
Thank you all!!
Manjiri Andahre
GIS co-ordinator
PA Fish & Boat commission
tel: (814)3595182
fax:(814)3595153
-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Richard Greenwood
Sent: Monday, November 22, 2004 12:15 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: Re: [UMN_MAPSERVER-USERS] jBox Java applet
On Mon, 22 Nov 2004 10:10:33 -0500, Andhare, Manjiri
<mandhare at state.pa.us> wrote:
> Hi Rich,
> Thanks for correcting me the way I have specified the archive. I have
> changed the code base to "c:/Inetpub/wwwroot/MapServer/java/jBox"
> And archive to "jBoxPNG.jar.
That's not correct. The codebase has to point to an HTTP address, not
to a file system directory. This is becasue the web page holding the
java applet is fetching the applet.
> But after hitting the "initialize" button, when I looked at the
> generated source code , I found that the path to the png map image
> generated by Mapserver was incorrect. Previously,I had put the code
for
> displaying the map image as:
> <param name="image" value="http://[host][img]">
> But my image was in heep://localhost/MapServer/Docs/tmp folder.
> So I changed that line to:
> <param name="image" value="http://[host]/MapServer/Docs/[img]"
> But the problem is, when mapserver put the value for [img], it creates
> it as: " \tmp\ITASCA11011353302004.png"
> Therefore I'm getting the value for the map image in the source as:
> <param name="image"
> value="http://localhost/MapServer/Docs/\tmp\ITASCA11011353302004.png">
> But I'm not getting the way so that the mapserver could correctly get
> the path to the image.
> An after doing all these changes, I neither see the map in the browser
> not the java consol error. So, I'm not sure whether the java applet is
> being called and executed or not.
Again, I think you are confusing HTTP addresses with file system
addresses. In your .map file you should have something like:
IMAGEPATH c:/Inetpub/wwwroot/MapServer/Docs/tmp/
# this is the file system directory where mapserver puts the
images,
# it should also be an IIS virtual directory
IMAGEURL /tmp/
# this is the HTTP address that the client browser reads from.
I may not have those exactly right because I am guessing at your
directory structure. But when set correctly
<param name="image" value="http://[host][img]">
should look something like this after being parced by mapserv.exe:
<param name="image"
value="http://localhost/tmp/ITASCA11011353302004.png">
You should be able to put the replaced values from [host][img] into
your browser's address bar an see the image. If you can't do that,
then you have an error in your .map file and/or your virtual directory
assignments in IIS. If you can't fetch the image in this way, then
there is no way that jBox will be able to get it either.
Rich
--
Richard Greenwood
richard.greenwood at gmail.com
www.greenwoodmap.com
> -----Original Message-----
> From: Richard Greenwood [mailto:richard.greenwood at gmail.com]
> Sent: Thursday, November 18, 2004 2:36 PM
> To: Andhare, Manjiri
> Cc: mapserver-users at lists.umn.edu
> Subject: Re: [UMN_MAPSERVER-USERS] jBox Java applet
>
> Looks like there are problems with your codebase and archive
> parameters. You have:
> codebase="java\jBox"
> archive="jBoxPNG.jar,png.jar"
>
> The way you have codebase, the 'java' directory will not be found. I
> assume that 'mapserver' is an IIS virtual directory, so try:
> 'codebase=/mapserver/java/jbox'
> Forward slashes, not back slashes, as this is a URI, not a DOS path.
>
> I'm a little unclear on the specification of two jar files in the
> archive parameter. Is that legal? Where'd you come up with that? And
> you have the .jar files in /mapserver/java/jbox/ not a subdirectory,
> right?
>
> You might want to start with GIFs and the standard jBox, rather than
> jBoxPNG which requries the sixlegs library. If you're using the Sun
> Java VM, you don't need six-legs anyway.
>
> I am cc'ing the mapserver-users list as others may spot something that
I
> missed.
>
> Rich
> --
> Richard Greenwood
> richard.greenwood at gmail.com
> www.greenwoodmap.com
>
> On Thu, 18 Nov 2004 09:49:02 -0500, Andhare, Manjiri
> <mandhare at state.pa.us> wrote:
> > Yes I have JVM and after running the demo, if I check the java
> console,
> > I get following:
> > ----------------------------------------------------
> > load: class jBoxPNG.class not found.
> >
> > java.lang.ClassNotFoundException: jBoxPNG.class
> >
> > at sun.applet.AppletClassLoader.findClass(Unknown Source)
> >
> > at java.lang.ClassLoader.loadClass(Unknown Source)
> >
> > at sun.applet.AppletClassLoader.loadClass(Unknown Source)
> >
> > at java.lang.ClassLoader.loadClass(Unknown Source)
> >
> > at sun.applet.AppletClassLoader.loadCode(Unknown Source)
> >
> > at sun.applet.AppletPanel.createApplet(Unknown Source)
> >
> > at sun.plugin.AppletViewer.createApplet(Unknown Source)
> >
> > at sun.applet.AppletPanel.runLoader(Unknown Source)
> >
> > at sun.applet.AppletPanel.run(Unknown Source)
> >
> > at java.lang.Thread.run(Unknown Source)
> >
> > Caused by: java.io.IOException: open HTTP connection failed.
> >
> > at sun.applet.AppletClassLoader.getBytes(Unknown Source)
> >
> > at sun.applet.AppletClassLoader.access$100(Unknown Source)
> >
> > at sun.applet.AppletClassLoader$1.run(Unknown Source)
> >
> > at java.security.AccessController.doPrivileged(Native
Method)
> >
> > ... 10 more
> >
> > Manjiri Andahre
> > GIS co-ordinator
> > PA Fish & Boat commission
> > tel: (814)3595182
> > fax:(814)3595153
> >
> >
> >
> > -----Original Message-----
> > From: Richard Greenwood [mailto:richard.greenwood at gmail.com]
> > Sent: Thursday, November 18, 2004 9:43 AM
> > To: Manjiri Andhare
> > Subject: Re: [UMN_MAPSERVER-USERS] jBox Java applet
> >
> > Do you have a Java Virtual machine installed?
> > Get one here:
> >
> > http://www.java.com/en/download/installed.jsp
> >
> > Rich
> > --
> > Richard Greenwood
> > richard.greenwood at gmail.com
> > www.greenwoodmap.com
> >
> > On Thu, 18 Nov 2004 07:29:16 -0600, Manjiri Andhare
> > <mandhare at state.pa.us> wrote:
> > > Hi!
> > > I was looking for the functionality to draw a rectangle for
zooming
> in
> > on
> > > the map. I found jBox by Steve Lime on
> > > http://mapserver.gis.umn.edu/contributed.html
> > > I have Windows 2000 and I'm running mapserver 4.2 on IIS.
> > > I follwed the steps from jBox HOWTO 4.2 to test it with the
workshop
> > demo.
> > > But when i try to run the workshop demo with "Basic application"
> > option, in
> > > the status bar of Browser(I'm using IE 6.0) I get the message as;
> > > Loading Java Applet Failed..
> > > And I'm not getting the reason behind this..
> > > Here is the changed portion of itasca_basic.html file:
> > > ***************************************
> > >
> > > <html>
> > > <head>
> > > <title>MapServer - Itasca Application</title>
> > > <script language="javascript">
> > >
> > > function setbox_handler(name,minx,miny,maxx,maxy)
> > > {
> > > document.mapserv.imgbox.value = minx + " " + miny
> > > + " " + maxx + " " + maxy;
> > > document.mapserv.imgxy.value = minx + " " + miny;
> > > //additional code can go here prior to the form
> > > submit, below
> > > //for example, form validation code.
> > > document.mapserv.submit();
> > > }
> > > function seterror_handler(message)
> > > {
> > > alert(message);
> > > }
> > > </script>
> > > </head>
> > > <body bgcolor="#ffffff">
> > >
> > > <center><h1>MapServer - Itasca Application</h1></center>
> > > <hr>
> > > <form method="GET" action="cgi-bin/mapserv.exe" name="mapserv" >
> > >
> > > <center>
> > > <table border="0" cellspacing="0" cellpadding="4">
> > > <tr>
> > > <td valign="top" align="center">
> > > <table width="390" border="0" cellspacing="0" cellpadding="4"
> > > align="center" bgcolor="#666666">
> > > <tr>
> > > <td colspan="2">
> > > <applet
> > > codebase="java\jBox"
> > > archive="jBoxPNG.jar,png.jar"
> > > code="jBoxPNG.class"
> > > width="600"
> > > height="600"
> > > name="jBox"
> > > MAYSCRIPT>
> > > <param name="image" value="http:\\[host][img]">
> > > </applet>
> > > </td>
> > > </tr>
> > > <tr><td bgcolor="#666666">
> > > <img title="scalebar (mi)" alt="scalebar (mi)"
> src="[scalebar]">
> > > </td></tr>
> > > </table>
> > > </td>
> > > <td valign="top" bgcolor="#ffffff">
> > > <table cellpadding="5" cellspacing="0" border="0"
> bgcolor="#ffffff">
> > > <tr><td>
> > > <center><input type="submit" value="Refresh/Query"></center>
> > > <p>
> > >
> > > <input type="radio" name="mode" value="browse" checked>
> > <b>Browse
> > > map</b><br>
> > > <input type="radio" name="mode" value="query"> <b>Query
> > > feature</b><br>
> > > <input type="radio" name="mode" value="nquery"> <b>Query
> > multiple
> > > features</b>
> > >
> > > <hr>
> > >
> > > <p>
> > > <b>Select Layers to Display: </b><br>
> > > <select multiple name="layer" size=3>
> > > <option value="airports" [airports_select]> Airports
> > > <option value="cities" [cities_select]> Cities
> > > <option value="lakespy2" [lakespy2_select]> Lakes & Rivers
> > > <option value="dlgstln2" [dlgstln2_select]> Streams
> > > <option value="roads" [roads_select]> Roads
> > > <option value="twprgpy3" [twprgpy3_select]> Townships
> > > <option value="drgs" [drgs_select]> USGS 1:250,000 Quads
> > > </select>
> > >
> > > <p>
> > > Zoom In <input type=radio name=zoomdir value=1
> > [zoomdir_1_check]>
> > > Pan <input type=radio name=zoomdir value=0
[zoomdir_0_check]>
> > > Zoom Out <input type=radio name=zoomdir value=-1
> > [zoomdir_-1_check]>
> > > <p>
> > > Zoom Size <input type=text name=zoomsize size=4
> > value=[zoomsize]>
> > > <p>
> > >
> > > <font size=+1><b>Legend</b></font><br><hr>
> > > <img src="[legend]"><hr>
> > >
> > > <p>
> > > <center>
> > > <input name="ref" type="image" src="[ref]"
> > > border="0"></center>
> > > </td></tr></table>
> > >
> > > </td></tr>
> > > </table>
> > > </center>
> > > <input type="hidden" name="imgbox" value="-1 -1 -1 -1">
> > >
> > > ***************************************************
> > >
> > > I have placed the jBox as:
> > > c:\Inetpub\wwwroot\MapServer\java\jBox
> > > And I have placed the jar files, class files and java source files
> > from
> > > lib,classes and src folders respectively under
> > > c:\Inetpub\wwwroot\MapServer\java\jBox
> > >
> > > If somebody could point out what i'm missing,it'll be great!!
> > > Thank you,
> > > Manjiri Andhare
> > > GIS Coordinator
> > > PA Fish & Boat Commission
> > > U.S.A.
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